package week5;

import java.util.Scanner;

public class ScoreGrade {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		System.out.println("점수를 입력하면 성적이 나옵니다~ \n종료하려면 -1을 입력하세요!\n");
		System.out.println("   SCORE       GRADE   ");
		System.out.println("=======================");
		
		while(true) {
			int score = sc.nextInt();
			if (score == -1) {
				System.out.println("프로그램을 종료합니다.");
				break;
			} else if (score < 0) {System.out.println("잘못된 입력입니다."); continue;}
			if (score >= 90) {
				System.out.printf("      %d        A\n", score);
			} else if (score >= 80) {
				System.out.printf("      %d        B\n", score);
			} else if (score >= 70) {
				System.out.printf("      %d        C\n", score);
			} else if (score >= 60) {
				System.out.printf("      %d        D\n", score);
			} else System.out.printf("      %d        F\n", score);
		}
		sc.close();
	}
}